They're not. You've picked one with quite a history, but let me explain.

It all started with the movie "A Night at the Roxbury", which involves two guys in the car doing that movement to the beat of 'What Is Love' by Haddaway. Yes, you read it right: two guys. Not three.

However, in the movie they say they see Jim Carrey at some point, though he doesn't actually appear in the movie. This is made fun of at the Saturday Night Live show at one point, who hire Jim Carrey (the real deal) to work on a sketch where he's edited into the footage of the movie.

That particular sketch has become famous and resulted in many, many gifs like that one. I first learned about the sketch from Jasper. I then later showed him the movie where it came from. Ask him when he comes back.

In short: they're rocking out to 'What Is Love'.

What you need to understand about the apocalypse is that you aren't Mad Max. You're part of the skull pyramid in the background.

actually, i'm pretty sure that the SNL sketch very much preceedes the film "Night at the Roxbury"...

i used to watch SNL pretty regularly when i still lived across the ocean, and i remember the sketch(es) first being aired, and then some time later the movie being released as part of the many SNL movies (or at least the many movies that were being made starring SNL cast memebers) that were being released at the time. it's sort of a "Wayne's World" situation...

of course, i could have my chronology all mixed up, but this is how i think it is.

but they are definatly rocking out to "What is Love" (baby don't hurt me, don't hurt me, no more....)